Well done, but the base kinda glooms out the tone. This dark feel might work better if the back of the model was also shadowy. The green light gets obfuscated by the green moss on the floor and bookstand. Also, the green glow should be visible on the arms. There should be green specular spots on the metal bits. The green light on the face looks like it's coming from a space above and before him, not from the book. Still, this is an ambitious effect, and you've made a nice effort! Please take my criticism in the way it's intended. :)